Answer:
210 stamps
Step-by-step explanation:
<u>Given:</u>
- Arthur ⇒ a = 3 k
- Yusuf ⇒ y = 5k
- Bill ⇒ b = 6k
<u>Yusuf gave </u><u>x</u><u> stamps to Arthur, then:</u>
<u>Bill gave Arthur 42 stamps more than Yusuf gave to Arthur, then:</u>
- b = 6k - (x+42)
- a = 3k + x + x + 42
<u>Now all 3 have same amount of stamps:</u>
- 5k -x = 6k - x - 42 = 3k + 2x + 42
<u>From the first part of the equation we get:</u>
- 6k - 5k = 42 + x - x
- k = 42
<u>How many stamps did Yusuf have at first?</u>
- y = 5k
- y =5*42
- y = 210 stamps
Yusuf had 210 stamps at first
Oldest = 2x
Middle = x + 5
Youngest = x
2x + x + 5 + x = 57
combine like terms
4x + 5 = 57
subtract 5 from both sides
4x = 52
divide both sides by 4 to isolate x
x = 13
Oldest = 2x = 2(13) = 26
Middle = x + 5 = 13 + 5 = 18
Youngest = x = 13
The correct answer should 1.1333
20% off means you pay 80% of the price so you multiply by 0.8, and 7% tax means you multiply by 1.07
Resulting cost = 18.99*0.8*1.07 = 16.26
Hope this helps let me know if im wrong!
